is 2 1837489 - 1
has 553140 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.170968.6567%500000150000000.10155.0711%16.272470.2462%1.5894%
PrimeNet2570.010463.1579%80001500000.00122.8813%0.011764.2194%1.0615%
GPU722610.167265.5738%90001400000.00131.5959%0.168466.1232%0.5494%
Difference+6+16.0038+3.0829%+491000+14860000+0.1002+3.4751%+16.1040+4.1230%+4.1230%

Known prime factors (3 factors, 179.5 bits, 0.00976719% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1837489167542247031133.9644559
47 × 97
-47971.237e-93.911e-67.524e-6
183748925437572638991991651.176692182991
29 × 541 × 44119
2014-06-19541441190.00020.00020.0004
1837489249203440602883022656472999692994.3316781086597059438795456
26 × 13 × 761 × 1933 × 3259 × 1700102449
2020-05-27325917001024493.174e+97.286513.609

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1837489426186807892556499877128972685.140
183748941752104406214159512103886142587093420739128.295
18374896339130622222562722084685580145121133182483144145.507
183748910620721886638502112231816280485527481449331136090
00193
55179.471
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:20alpertronManual testing5000001500000012-
skipped known factor: 16754224703
skipped known factor: 2543757263899199
--0.101--5.071%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-06-19T11:32:00TJAOIManual testing??51.176162.58312e-50.2135.51512e-5


ECM factoring results:

Old Calculation Method

Total ECM effort:19.237 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:19.237 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.5750.019%
25500000.77745.986%
302500000.04895.308%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
500005000000332.280
50000500000030.207
50000660000021516.75


Lucas-Lehmer results:
No L-L results for M1837489


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T03:09:48Oliver KruseGTX-2
16754224703
2543757263899199
BF7DFBDB968D35__no
2017-11-06T09:56:20kkmrkkblmbrbkc4.xlarge
16754224703
2543757263899199
BF7DFBDB968D35__no
2020-05-27T13:51:57ATHec2-PRPCF
16754224703
2543757263899199
24920344060288302265647299969
2E22285C888F9145no
2020-06-06T11:00:08oodairacom2
16754224703
2543757263899199
24920344060288302265647299969
2E22285C888F9145no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2021-04-30T08:12:46+00:00